9921201110 has 32 divisors (see below), whose sum is σ = 18640564992. Its totient is φ = 3794723680.

The previous prime is 9921201089. The next prime is 9921201113. The reversal of 9921201110 is 111021299.

It is a self number, because there is not a number n which added to its sum of digits gives 9921201110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921201113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096505 + ... + 1105515.

It is an arithmetic number, because the mean of its divisors is an integer number (582517656).

Almost surely, 2^9921201110 is an apocalyptic number.

9921201110 is a deficient number, since it is larger than the sum of its proper divisors (8719363882).

9921201110 is a wasteful number, since it uses less digits than its factorization.

9921201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13828.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 9921201110 is about 99605.2263187028. The cubic root of 9921201110 is about 2148.7608587066.

The spelling of 9921201110 in words is "nine billion, nine hundred twenty-one million, two hundred one thousand, one hundred ten".